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molecule, compounds and elements

Total questions: 38

Worksheet time: 21mins

Name
Class
Date
1.

What is a compound?

a)

Two different elements bonded together.

b)

Two of the same elements bonded together.

c)

A mixture of different substances.

d)

Two substances stuck together with glue.

2.
The tiniest bit of water that still is water is a molecule of water.
a)
True
b)
False
3.
An oxygen molecule usually has two oxygen atoms.
a)
True
b)
False
4.
Hydrogen is a compound.
a)
True
b)
False
5.
Carbon dioxide is a compound.
a)
True
b)
False
6.

Two or more atoms joined together make up a _____.

a)

atom

b)

molecule

c)

solution

7.
A substance that is made up of atoms of more than one element is a _______. 
a)
compound
b)
rust
c)
molecule
8.
The smallest unit of a compound is a ___.
a)
molecule
b)
atom
c)
matter
9.
What is the tiniest particle in the entire universe?
a)
cells
b)
gases
c)
atoms
d)
liquids
10.
What is the picture displayed?
a)
atom
b)
element
c)
molecule/compound
d)
cells
11.

These are non living materials made of only one kind of atom.

a)

Mixtures

b)

Compounds

c)

Nucleus

d)

Elements

12.

Molecules formed from different types of atoms, such as when carbon combines with oxygen to form carbon dioxide gas (CO2). Molecules formed from different types of elements are called what?

a)

Atoms

b)

Electrons

c)

molecules

d)

Compounds

13.

What is formed when two or more atoms form together?

a)

Molecule

b)

Chemical reaction

c)

Physical reaction

d)

Compound

14.

An atom has a center called the nucleus. Inside the nucleus are tiny particles called ______________ and _____________.

a)

Electrons

b)

Protons

c)

Neutrons

d)

Protons and neutrons

15.
What do we call a substance consisting of a single atom?
a)
coefficient
b)
element
c)
compound
d)
molecule
16.
What do we call a chemical substance made up of 2 or more different types atoms bonded together?
a)
formula
b)
atom
c)
subscript
d)
compound
17.
When __________ form, the elements lose there individual chemical properties and take on new properties.
a)
compounds
b)
atoms
c)
subscript
d)
formula
18.
A recipe for a chemical substance is called a ________ _________.
a)
coefficent
b)
chemical formula
c)
Oxygen
d)
atom
19.
H2O2← ?
This number tells the number of atoms present.
a)
coefficient
b)
molecule
c)
subscript
d)
atom
20.
→2H2O
This number tells how many molecules are in a chemical equation.
a)
coefficient
b)
subscript
c)
compound
d)
element
21.
 2H2O
How many Hydrogen atoms are present?
a)
2
b)
4
c)
1
d)
10
22.
2H2O
How many Oxygen atoms are present?
a)
2
b)
4
c)
1
d)
5
23.
2H2O
How many H2O molecules are present?
a)
1
b)
4
c)
2
d)
8
24.
What does this image represent?
a)
Atom
b)
Element
c)
Molecule
d)
Marshmallows
25.
Carbon dioxide (CO2) contains how many atoms of oxygen?
a)
0
b)
1
c)
2
d)
3
26.

This picture represents which of the following?

a)

Element

b)

Compound

c)

Molecule

27.

This picture represents which of the following?

a)

Element

b)

Compound

c)

Molecule

28.

This picture represents which of the following?

a)

Element

b)

Compound

c)

Molecule

29.

This picture represents which of the following?

a)

Element

b)

Compound

c)

Molecule

30.

This picture represents which of the following?

a)

Element

b)

Compound

c)

Molecule

31.

This picture represents which of the following?

a)

Element

b)

Compound

c)

Molecule

32.

This picture represents which of the following?

a)

Element

b)

Compound

c)

Molecule

33.

This picture represents which of the following?

a)

Element

b)

Compound

c)

Molecule

34.

The smallest particle that makes up matter.

a)

Atoms

b)

Elements

c)

Molecules

d)

Compounds

35.

You can find all 118 _______ on the Periodic Table.

a)

Atoms

b)

Elements

c)

Molecules

d)

Compounds

36.

Salt (NaCl) would be considered which of the following?

a)

Element

b)

Molecule

c)

Compound

37.

Oxygen would be considered which of the following?

a)

Element

b)

Molecule

c)

Compound

38.

Copper would be considered which of the following?

a)

Element

b)

Molecule

c)

Compound

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